body{
    margin: 0;
    padding: 0;
}
a{
    color: red;
    text-decoration: none;
}
.fl {
    float: left;
}

.fr {
    float: right;
}

.clearfix:after{
    content:'';
    display: block;
    clear: both;
}

.continer {
    margin: 0 auto;
}
.continer .top,
.continer .body,
.continer .nav {
    width: 1000px;
    margin: 0 auto;
}

.continer .top {
    height:105px;
}

.continer>.nav {
    height: 70px;
    width: 100%;
    line-height: 70px;
    border-bottom: 1px solid red;
}

.continer .nav a {
    margin-right: 20px;
    font-size: 16px;
    font-weight: 700;


}

.imgcontiner {
    width: 100%;
    height: 0;
    overflow: hidden;
}

.imgcontiner img {
    width: 100%;
}

.banner .imgcontiner {
    padding-bottom: 20%;
}

.body .imgcontiner {
    padding-bottom: 150%;
}

.body .item {
    width: 25%;
    float: left;
    padding: 0 15px;
    box-sizing: border-box;
}

.mb15px {
    margin-bottom: 100px !important ;

}

.text-center {
    text-align: center;
}
.item .pro_name {
    margin: 5px 0;
}

.item .pro_price {
    color: red;
    display: block;
}

.btn {
    background: #333;
    color: #fff;
    display: block;
    padding: 5px;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    -ms-border-radius: 5px;
    -o-border-radius: 5px;
}
.nav{
    margin-left: 200px;
}
.footer {
    background-image: url(../img/work2_41.jpg);
    height: 173px;
}

@media screen and (max-width:400px){
    .continer {
        margin: 0 auto;
    }
    .continer .nav a {
        margin-right: 20px;
        font-size: 16px;
        font-weight: 700;
        display: block;
        margin-bottom: 5px;
    
    
    }
    .continer>.nav {
        height: 150px;
        width: 100%;
        line-height: 70px;
        border-bottom: 1px solid gray;
        box-shadow: 1px 1px slategray; 
        display: block;
        margin-bottom: 5px;   
    }
    .body .item {
        width: 100%;
        margin-bottom: 15px;
        padding: 0 15px;
        box-sizing: border-box;
    }
    .continer .top {
        height:300px;
    }
    .fl {
        float: none;
    }
    
    .fr {
        float: none;
    }
    .continer {
        margin: 0 auto;
    }
    .continer .top,
.continer .body,
.continer .nav {
    width: 200px;
    margin: 0 auto;
}
    


}
@keyframes

